From: "Martin J. Bligh" <mbligh@aracnet.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Subject: [Bug 849] New: [perf][tiobench] tiobench sequential write degrades in 2.5.72-bk2
Date: Tue, 24 Jun 2003 15:28:04 -0700 [thread overview]
Message-ID: <194570000.1056493684@flay> (raw)
http://bugme.osdl.org/show_bug.cgi?id=849
Summary: [perf][tiobench] tiobench sequential write degrades in
2.5.72-bk2
Kernel Version: 2.5.72-bk2
Status: NEW
Severity: high
Owner: akpm@digeo.com
Submitter: slpratt@us.ibm.com
Hardware Environment: 8way 900mhz adaptec scsi drives
Software Environment: sles8.0 + 2.5 kernel
Problem Description:
tiobench sequential write throughput drops between 2.5.72-bk1 and 2.5.72-bk2 for
multi threaded IO.
tolerance = 1.00 + 5.00% of 2.5.72-bk1
2.5.72-bk1 2.5.72-bk2
Theads MBs/sec MBs/sec %diff diff tolerance
---------- ------------ ------------ -------- ------------ ------------
1 43.27 42.90 -0.86 -0.37 3.16
16 11.86 4.35 -63.32 -7.51 1.59 *
64 3.95 2.50 -36.71 -1.45 1.20 *
Results:Sequential Write CPU (Graph)
tolerance = 1.00 + 3.00% of 2.5.72-bk1
2.5.72-bk1 2.5.72-bk2
Theads %CPU %CPU %diff diff tolerance
---------- ------------ ------------ -------- ------------ ------------
1 52.87% 50.78% -3.95 -2.09 2.59
16 127.6% 49.03% -61.58 -78.57 4.83 *
64 37.51% 22.15% -40.95 -15.36 2.13 *
http://ltcperf.ncsa.uiuc.edu/data/2.5.72-bk2/2.5.72-bk1-vs-2.5.72-bk2/
Folloow link for tiobench.ext3 summary report and full results.
Steps to reproduce:
tiobench --dir /mnt/tmp --block 4096 --size 600 --numruns 10 --threads 16
reply other threads:[~2003-06-24 22:25 UTC|newest]
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